Question for Umberto about GPU RAM and 64bit O/S

[altstiff]

This old post on AVSIM (from May 2012) has the tweak you mentioned cmpbllsjc. As well as some other interesting points.

http://forum.avsim.net/topic/373830-videomemoryoverride-does-it-really-work/

After reading that post I am even more perplexed (not hard to do to me really).

From what I gather the entire video memory is not mapped to the VAS (using DX9 while on a 64bit system using a 32bit app flagged LAA).

But as Ryan said, maybe the tweak works on the FSX level (not taking into account what the GPU uses in ram to provide AA/AF, maybe that is mapped seperatly)

[virtuali]

From what I gather the entire video memory is not mapped to the VAS (using DX9 while on a 64bit system using a 32bit app flagged LAA).

Regardless of that tweak, in any DX9 application, the entire video memory is never allocated, only the one actually needed by the application.

This means that, when we measure the FSX RAM allocation using for example Process Explorer, we are measuring the entire memory requirement, including a part that it's also used by the video card.